The demand function for a product is modeled by p = 400 – 4x, 0 < x < 100, where p is the price per unit (in dollars) and x is the number of units. (a) Determine when the demand is elastic and inelastic. (Enter your answer using interval notation. If an answer does not exist, enter DNE.) elastic demand inelastic demand Determine when the demand is of unit elasticity. (Enter your answers as a comma-separated list.) X = (b) Use the result of part (a) to describe the behavior of the revenue function. (Enter your answers as a comma-separated list.) The revenue function ---Select--- then is flat at x = and then --Select--- v.

A perfectly elastic demand curve has an elasticity coefficient of a. 0. b. 1. c. less than 1. d. infinity.

Prove that price elasticity of demand is not the same as the slope of a demand curve.

Suppose a university raises its tuition from 3,000 to 3,500. As a result, student enrollment falls from 5,000 to 4,500. Calculate the price elasticity of demand. Is demand elastic, unitary elastic, or inelastic?

If automobiles and gasoline are complements, then their cross-elasticity coefficient is a. strictly greater than 1. b. positive. c. equal to zero. d. negative.

(Calculating Price Elasticity of Demand) Suppose that 50 units of a good are demanded at a price of Si per unit. A reduction in price to $0.20 results in an increase in quantity demanded to 70 units. Using the midpoint formula, show that these data yield a price elasticity of 0.25. By what percentage would a 10 percent rise in the price reduce the quantity demanded, assuming price elasticity remains constant along the demand curve?

The Stopdecay Company sells an electric toothbrush for $25. Its sales have averaged 8,000 units per month over the past year. Recently, its closest competitor, Decayfigh ter, reduced the price of its electric toothbrush from $35 to $30. As a result, Stopde cays sales declined by 1,500 units per month. What is the arc cross elasticity of demand between Stopdecays toothbrush and Decayfighters toothbrush? What does this indicate about the relationship between the two products? If Stopdecay knows that the arc price elasticity of demand for its toothbrush is 1.5, what price would Stopdecay have to charge to sell the same number of units as it did before the Decayfighter price cut? Assume that Decayfighter holds the price of its toothbrush constant at $30. What is Stopdecays average monthly total revenue from the sale of electric toothbrushes before and after the price change determined in part (b)? Is the result in part (c) necessarily desirable? What other factors would have to be taken into consideration?

The president of Tucker Motors says, Lowering the price wont sell a single additional Tucker car. The president believes that the price elasticity of demand is a. perfectly elastic. b. perfectly inelastic. c. unitary elastic. d. elastic.

On Tuesday, the price and quantity demanded are 7 and 120 units, respectively. Ten days later, the price and quantity demanded are 6 and 150 units, respectively. What is the price elasticity of demand between the 7 and 6 prices?

Jills Sausage Dog Stand projects the following demand for Jills sausage dogs: a. Calculate the price elasticity of demand between 2 and 4. Is demand in this range elastic or inelastic? b. Calculate the price elasticity of demand between 4 and 6. Is demand in this range elastic or inelastic?